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Q. chooses the statement that best describes a buffer.
1. A buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions as bases are added.
2. Buffered solutions are always neutral, with a pH of 7.
3. A buffer stabilizes the pH of a solution by preventing acids or bases from dissociating.
4. A buffer causes acidic solutions to become alkaline, and alkaline solutions to become acidic.
5. A buffer prevents pH of a solution from changing while an acid or base is added.
Cystic fibrosis is a chronic lung and digestive disease caused through a mutation in the CFTR gene on chromosome 7. In the US approximately 39 in 10,000 individuals are affected.
The following type of mechanism of evolution is given: This mechanism of evolution is ANIMAL AND PLANT EVOLUTION (such as hox genes, gene duplication
Use knowledge of biological principles to ask relevant questions about the natural world make observations and discriminate in scientific and pseudoscientific explanations
How does the mechanism of heredity work ? or How do these Traits get Expressed ? (this is same question )
Analyze the DNA of the Phenylalanine hydroxylase gene in patient with phenylketonuria revealed a mutation in protein coding region whose predicted effect would be to replace the amino acid aspartic acid, with histidine.
A student with Strep throat is given a prescription for an antibiotic and is told to take the drug for two weeks. After a week, the student feels better and stops taking the drug.
Tumor-promoting mutations are described as being either gain-of-function or loss-of function. Describe the effects of both classes of tumor-promoting mutations on the cell cycle and apoptosis.
Ion concentrations have a impact on whether there is dissolution of minerals. Microorganisms can alter the charges on their cell surfaces to enhance these processes.
which pair of terms most accurately describes life-history traits for a stable population of wolves?
Explain the four categories of amino acid side chains. Determine what types of interactions are the members of each of these categories likely to make?
A client was admitted to the hospital with hypertension. The development of arteriosclerosis associated with hypertension has further increased resistance to blood flow, worsening his hypertension. This is an example of what type of feedback loop?..
In the jimsonweed plant, purple flowers are dominant to white. Self-fertilization of a particular purple-flowered jimsonweed produces 28 purple-flowered and 10 white-flowered progeny. What proportion of the purple-flowered progeny will breed true?
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